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Colorful sea in milk

Create a colorful sea with one throw! Equipment: differently-colored alcohol-based markers, cotton disk, deep plate, milk. Use markers to thoroughly saturate a cotton disk with ink, then toss the disk into a plate of milk: the milk becomes multicolored! The marker ink permeates into the cotton fibers that make up the disk. As soon as the cotton disk comes into contact with the milk, some of the ink, which is less dense than the milk, floats to the surface. Surface tension stretches the ink into a thin film on the milk’s surface, as the dye molecules interact with the milk molecules more strongly than with each other. More safe experiments are waiting for you in the MEL Kids subscription! Warning! Only under adult supervision.